Valved fusible plug.



VVK H. MCNUTT.

vALvED FUSIBLE PLUG.

FPLICATI'ON MLU) SEPT. 'l, 1913A Y V a'teused June 20, 191.

.i We.

izo

, WILLIAM H. McNUTT, oF New vomi;

y, f PATENT minion.

To all whom t may conce/rin.'

Be' it known that I, Wingnut 3" o citizen of the United States, vand"resident 'of New York city, }in the conntyof New York und State-of "NeWQyYor-lyfhove invented certain new zindf usefl Improvements in'Valved Fusiblellngs, .of which the following is a(`epeoieotion."l j n.

IThis invention relates to e sefety 'device in the form of a.: volved' which' the main portion or body the defL vice'S formedo a residily fii'sillenmterinl orfilloyg and is adopted fsnitnble threaded opening or 'spilt 1nk :t 'reprising n body' normally l closedby I1 40 tormilly. Vscrew-tlii-ee'de nble .in the bore,

lreptnole, andnvhiclilmfsi its bore provided A with evolve tlmtlisnormully @10SM Mld en n open 'trom abn'orxnii'l internel pressure in the container.1 4 I The object of this inventionl is torprovide means to permi iiponf o `Vfire` roccurring` in. the vicinity, the entire f'b'ody member 'of the device will veryquilily soften and be blown ont of the receptecle,*thns 'providing freeescepe. for the fgos' o1 vapor.

embodiments of" my invention,r Figure y1 lis Fig. 5 `showethe. plng'leombined w ith n bnshf ing', Fig. (i is e plenofjtlie devioeosbshown `in Figa. 5,; ondyllig `7isf:i'l'bottoxn view of the some,` Y

denoted ggenerally. "by (43, provided. withn vulve? kinitieborethotisi held i' me; f

The body (Tis/form J, 'jzir'idfprovided with. n wrench-englgngin`D lheed: L10j, whieh is hexagonal in contour-nod mode of o.l ieudlylfi'l'sible nntterililjlor alloy, that will soften or melt 'nt low teinperntlu'e,suoli :is :about 400 l?.

The bore 12 of the body serves ltxfo'guide v'nlve7, thatl is freely slidsoygtsto pern'nt outflow of the gas orvfipor' .from `tlie rece1 tecle. At

thestem .13 of the Athe outer end .the bore moyi'be enln'vrged or .1 oountersnnk, l

' l ot tl-,rior the vulve 7,

to form e' recessed valve sont so that the valve will niv., Assenon To CARRIE ".FnANKLiNNnW YORK.'

Afusible plug, in

e nntrlli, which engages one end o to screw into e l' Spring- S; and' as the other end of the spring v is confined bythe i ingthis nut on'` the stem (or vice verse), the

t they immediate' escape' or release of explosive gos orvapor 'generated in the receptacle, and

withI n Screw-driver,

4the nut must travel toward,

.blelplug iis', shown oomboler, being the vseid body is a compnkrzttively y .EMMA CWEN, Fl

u u K 1122x-,touted Jnne 20, 1916.

serie; no. 'ii/50,221.

Vbe..proteoted from rinjury or displacement by being positioned below the outer or top wall ofthe head.

vEhe kstern' 1,3 of the valve is shown profA jectingdown belmvorl beyond the body 6, and is Surrounded by e coil spring 8, which is vcompressed between the lower end'of the body 'and the lower end portion of the stem,

to thereby retain the vulve seated by spring pressure.

VvThe stein 13 is shown asfthreaded to arry the end ofthe body, by turntension' olf the yspring will be adjusted.

The (foil spring 8 is shown es hevingone x end'projecting into the body G, and prefer 'ablySeonred therein; and the other end of the spring' is inserted into :i hole in the nut 15, and `fastened therein, whereby the nut is prevented from turning relative to the bodyr .The valve is snown as beingr provided Filth :i tool-engaging portion 'at the top,

such as o 's101217 and by tnrii1ig-the volvo n since the jnnt'is prevented from 'rotating relative to the head, or away from of the spring thebody, und thus the tension 'lean bexndjusted from'tl'ie outside .of the reeepta-ole, .and ofterthe veli/ed plug'hes been secured'in'the receptacle. l, I have discovered by experiment thatthe body member een be mede by the process. yknown as d1e-east1ngj and 'of a. `readily fusible olloyor composition. With this proees's, the body mernheiff ondfits'threaded poretion and conntersiink bore',v are properly shaped, and ,the member-isiiriinished condition 'when' removed jfromfthe. dies gv with ont-:my machining whatever, or any.' 1ne--" .clni'nioel 'inonipulat I fet V'all being neges- K e the volved fnsible plug isshoyvn 4 screwedv into e threaded eput, l8, ii1 the topv On theoccurrence of e to melt or soften, and the be blown out of the recep- :i relatively large opening for the escape of the confined gas'or vapor. W'ith the use of the valve fsible plug or large receptacles, it is desirable to emloy protecting means against back-fire of Eux-ning gas or vapor into the receptacle, such as a shield of perforated sheet metal. In Fig. 5 is shown :i flame-proof bushing 20, that is externally screw-threaded at 21, t0 screw into a split 22, and whose lower end is closed by a disk 23 of thin sheet metal having minute flameproof'apertures.

cause the body body will then tacle, providing The bore 24 of the bushing is somewhat' larger than the head 10 ofthe body of the fusible plug, to permit the body to be screwed into the reduced threaded portion 25 0f the bushing; With the use of such a structure, when heat is evolved sufficient to soften' the bodv of the plug, it will be blown lout o the bushing, and theperforated disk 23 will rece tac aving thus described my invention, what aimlim-f bl l .f

vn ved usi. e .p ug, compri a tu-y bular body composed entirely d?? readily fusible material that is externally screwthreaded and provided with ja wrench-engaging head' at one end, the bore of the body being enlarged at the head end, a valve seated in the latte l ortion 'of the bore with its stem freely slide jecting be ond the bodya,nd n coil spring on the va ve stem compressed between the end of the body and the end of the stem to hold the valve seated to open internal pressure. A l y WILLIAM H. MCNUTT. Witnesses:

Crus. E. Jon'm, AGNES Omen.

prevent flame Apassing downv into the e Y le in the bore and pro-` 

